Boat-davit.



H. F. NORTON.

BOAT DAVIT.

APPLIUATION rxLxzD MAR. 29, 1911.

Patented Dec. 12,1911.

STATES:

PATENT OFFICE.

NORTON, or'NEWPOnT News, VIRGINIA Boar-DAVIT.

, Application led Huch 29, 1911. Serial 110.317,607.

To all whom it may concern:

asl

.are pivoted to the Be it known thatI, HAROLD F. NORTON, a citizen of the United States, residing at Newport News, in the countyof Warwick and State of Virginia, have invented certain new and useful Improvements in Boat- Davits, of which the following is a speci- This invention comprises a davit" and mechanism for operatin it to lift a` boat from the deck of a vesse' and swing it outboard into position to be lowered into `the water. v

The improveddavit is-a swinging arml of structural steel, pivoted-at-itsvlower end to the deck of-the vessel at thev gunwale, and

having a curved upper end with a hole to receive thehookof the fall-block.

The davit is Operated by hand-mechanism comprising va non-.revoluble member pivoted to the davit between its ends'and a revoluble member journaled in a bearing swiveled in a stool carries a nut and the other member has a long screw entering the nut. The revoluble The revoluble member has a hand:crank on its outer end. The member preferably tubularv thus having the necessary strength to resist stresses of compression, tension and torsion, with minimum weight. The bore of the tube serves as a chamber to receive,and rotect the screw when the boat is stowed in oard, preventing the threads from being lclogged with dirt and ice; it also holds a lubricant for lthe threads. The two interconnected members davit and tothe .deckstool, respectively, at about the same height, such as to bring the crank into position for easy operation, normally lyin in a substantially horizontal position, Oscil ating through a short arc in use, and transmitting the power directly to the davit. I

The apparatus is shown in the accompanying drawings, in which--` Fi re 1 is a side elevation of the davit and 'Its operating mechanism; Fig. 2 is an end elevation of the same, viewed from inboardgand Fig. 3 is a sectional side elevav tion of the operating members, on a'larger` scale.

The apparatus illustrated comprises a davit-arm 1 of channel steel, pivoted at its lower end 2 to the deck of the vessel at the gunwale, and having a curved narrowed secured to`the deck. One member' with a nut isl upper end 3, .the tip of which is bent downward and has a hole 4 to receive the hook of the fall-block. A cleat 5 for the block-'rope is secured to the lower end of the arm. A cylindrical pivot 6 is fixed to the davit-ar'm toward its lower end, extending through a hole in the web of the channel-beam and projected therefrom at both ends. On these endsare swiveled the eyes 7 of a yoke carrying the non-revoluble operating member. This member is shown as a tube 8, one end of which is firmly riveted in a collar 7 joinis welded to its other end. A cap 10 closes the open end ofthe. tube.I to exclude water and dirt and retain a lubricant.` The nut 9 receives the long screw of the other operating memberll, a stop-nut 12 being fixed on is fixed on the revoluble member 11 near its outer end, being screwed thereon and held by a check-nut 14. This bushing is journaled in the swivel-piece 15 having trunnions 16. The reduced outer end 17 receives a hand-crank 18l removably held by a screwpin 19. The trunnions 16 are journaled in bearings 20, secured on the deck-stool 21. This stool is built of structural steel, and comprises a vertical member 2la and an inclined member 2lb, upper ends to a channel-beam 22, inclosing a wood beam 23 which is secured to the deck-sheathingQ/l. A bracket 25 is secured to the channel-member 22,1'1ear the gunwale and a bolt 26 serving as the pivot for thelower end of the davit extends through and is clamped in the' ing the arms of the yoke, while a long nut 9V the inclosed end of the screw. A bushing 13.

secured together at their and riveted at their lower` ends men, one at simple, light The davit is substantially straight and is entirely sup- .ported by a pivot at the gunwale, quickly A and directly transferrlng the boat outward to the maximumdistance. The apparatus is yreadily built of' ordinary materials, including structural steel, and the necessary machine work is reduced to the minimum amount. The apparatus may be completely assembled in the shop and is readily attached to the ship, ythe weight being largely carried at the Wale.' The channel of the deck-stool supplements the athwartship Correction in Letters Patent No. 1,011,477;

strength.' "As the davit is shifted outward, the boat rises slightly and is lifted out of the chocks. cleat on the davit does not pull through the blocks as the boat is swung out.

I claim:

l. A davit supported by a pivot' at its lower end, and means for oscillating said davit, comprising two substantially horizontal members connected by a nut and long screw, one member being non-revoluble and directly swiveled to said davit intermediate its ends, the other member being revoluble,

and a fixed deck-stool having a swiveled bearing in which said revoluble member is journaled, its outer end extending through the bearing and carrying a crank. l

2. A davit supported by a pivot at its lower end, and means for oscillating said davit, comprising two substantially horizontal interconnected members, one member being non-revoluble and directly swiveled to t said davitintermediate its ends, the other member being revoluble, one member'being tubular and having a `nut at one end, the

The fall-rope being attached to a,

Signed and s'ealed'this 16th day of January, A. D., 1912.

other member having a long screw engaging said nut-, and a fixed deck-stool having a swiveled bearing in which said revoluble member is journaled, its outer end eXtending through said bearing and carrying a crank.

3. A davt supported by apivot at its lower end, a pivot on each side of said davit intermediate its ends,I a yoke swiveled on said pivots, a substantially horizontal tube fixed at one end to said yoke and having a nut at its other end7 a substantially-horizontal threaded shaft engaging said nut, a fixed deck-stool having bearings, a swivel-piece pivoted in said bearings, an opening in said swivel-piece inwhich said threaded shaft is l journaled, and a crank on the outer end of said shaft.

In testimony whereof, I aflix my signature in presence of two witnesses.

HAROLD F. NORTON.

Witnesses: y

v E. N. CooNBRooKs,'

W. GATEWooD.

lt is hereby certified that in Letters Patent No.. 1,011,477, granted Deeember 12, -1911upon the application of Harold F. Norton, of Newport News, Virginia, for an improvement in Boat-Davits, an error appears in the printed speciti` cation requiring correction as t'ollows: Page l, lines 25-26, .strike out the `words v The revoluble member has a long screw entering the nut."'; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent AOtce.

o. o. BiLLiNes,

Acting Commissioner of Patents Correction in Letters Patent No. 1,011,477;

strength.' "As the davit is shifted outward, the boat rises slightly and is lifted out of the chocks. cleat on the davit does not pull through the blocks as the boat is swung out.

I claim:

l. A davit supported by a pivot' at its lower end, and means for oscillating said davit, comprising two substantially horizontal members connected by a nut and long screw, one member being non-revoluble and directly swiveled to said davit intermediate its ends, the other member being revoluble,

and a fixed deck-stool having a swiveled bearing in which said revoluble member is journaled, its outer end extending through the bearing and carrying a crank. l

2. A davit supported by a pivot at its lower end, and means for oscillating said davit, comprising two substantially horizontal interconnected members, one member being non-revoluble and directly swiveled to t said davitintermediate its ends, the other member being revoluble, one member'being tubular and having a `nut at one end, the

The fall-rope being attached to a,

Signed and s'ealed'this 16th day of January, A. D., 1912.

other member having a long screw engaging said nut-, and a fixed deck-stool having a swiveled bearing in which said revoluble member is journaled, its outer end eXtending through said bearing and carrying a crank.

3. A davt supported by apivot at its lower end, a pivot on each side of said davit intermediate its ends,I a yoke swiveled on said pivots, a substantially horizontal tube fixed at one end to said yoke and having a nut at its other end7 a substantially-horizontal threaded shaft engaging said nut, a fixed deck-stool having bearings, a swivel-piece pivoted in said bearings, an opening in said swivel-piece inwhich said threaded shaft is l journaled, and a crank on the outer end of said shaft.

In testimony whereof, I aflix my signature in presence of two witnesses.

HAROLD F. NORTON.

Witnesses: y

v E. N. CooNBRooKs,'

W. GATEWooD.

lt is hereby certified that in Letters Patent No.. 1,011,477, granted Deeember 12, -1911upon the application of Harold F. Norton, of Newport News, Virginia, for an improvement in Boat-Davits, an error appears in the printed speciti` cation requiring correction as t'ollows: Page l, lines 25-26, .strike out the `words v The revoluble member has a long screw entering the nut."'; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent AOtce.

o. o. BiLLiNes,

Acting Commissioner of Patents Correction in Letters Patent No. 1,011,477.

"The revolnble member has a long screw entering the nnt.";

lt is hereby certitied that in Letters Patent No. 1,011,471', granted Dezzeniber 12, 1911', upon the application of Harold F. Norton, of Newport- News, Virginia, for an improvement in Boat-Dznlits, an error appears in the printed specification requiring1 correction as follows: Page l, lines 25-211, lstrike out the words and that the said Letters Patent should be read with thi correction therein that the sante muy conform to the record-of the case in the Patent Oce.

Signed and sealed this 16th day of January, A. D., 1912.

C. C. BILLINGS,

Acting Ommnss'ioner of Patents [SEAL] 

